Thanks ace - I'd like to add one comment regarding why we may see a lot of folks giving up after a little while, which I think also adds to your position. Many folks today, it they're not good/great at something right away, give up.
There was a great episode of the Simpson's, where Homer said to Bart, "You tried and you failed, so what did you learn? Never try."
Homer then followed the remark up with something along the lines of, "Just throw it in the closet, along with your Karate Gi, your guitar, and all the others things that you weren't good at right away!"
I think you're right, in the sense that something like straight shaving takes some dedication and practice, and many lose interest the second it's not working out for them, or an iota of frustration comes into the picture. So why try? Just pick up the cartridge razor, or whatever else you're not good at instantly, and take the easy road.
As always, just my opinion...